Improvement in



l .jnegative'carbons in proportion to their con- Unrrfn 4"nsflne;

eserAvidwere con` PAfrgsinfr TOFFICE.

nimm s', Menager n' roonsrn, NEW Yorin.'

4llwll'iiiovsin,enr in; n'EeULnToRs Fon st iaojrnl'cmfellliivlPs,

.To allaohom tmcg] concern; n D Be itknown' that. l,- ll'mmr S'Mnxrn, of the city'of Brooklyn, inthe county o'f-Kings and State of NewYork, hare invented certain :nw'jand useful Improvements 'in' llle'ctrie- Lamps or Regulators, Awhich improvements are fully-set forth in 'the' following' specifica- -tion nlnbthe"accompanying drawing, which forms Aa part of the same. 2 lbeobjct of Jthis invention is to produce an electriclampwhich shall have no clock-work: about it, and yet be quite as sensitive as those`v whichj (lo-contain'su'chvwork. vElectric-flamps as heretofore made maj' be Said to: consist of two classes., viz., those which 're' operated by clock-work and have many, fine adjustments wbichfecd the positive and ``4slnnptiii, and thsejwhicb 'contain no? clock- Work and feed brit one carbon, and thus 'allow the arc'to change its relative'position. r.lhose "of the rst class are expensive in construction',

and, from their'ne adjustments, .are liable to `(lera-ngexnents,while vthose-of the 'latter class have.. never vbeen made to feedsteadily, and when thelight is used with' a rciiector it is soon'o'ut of focus, as but one carbon is fed. 1

In my invention I have produced, a lamp whiel i,`wl1ile it is without clock-work and delii cate points, is quite as sensitive as any lamp -heretofore made, nnd'alsokeepsthe are nlways infocus, as it feeds both-of4 the carbonsexatly in proportion to Athe consumption of ,The accompanying drawing isa side eleva` tion-of my invention, in which Arepresents the positivecar'bon carrier, 13, the negative# carbon carrier; C, a blockV secured to carrier or rod B, and provided with a pulley, D; E,-

*npnl ley monnted on the stationary frameF;

G, a ratchet, the shaft of which 'passes through the llever P, and is provided with a--p'inion at- .t-he other end.,j (Shownin dottedlines.) Both ratchet and viniox are secured firmly to the same shaft ad revolvet ,g';eth`cr,the' pinion .meshing into the rack I. H, the pawl ofratchet G, tipped with a hardened-steel'point; J J J, acord, one nd 'of'whieh is 'securedto the lower end of 'the positive-carbon carrier at f, thence up and aronndthe pulley E, thence ,down and around the pulley l), and thence f upward, when it is secured i'o'- the stationary cycli; L, thepix'ot of -pawl H; M, aV core otvvsoft, iron, suspended by the link N, which is 'pivot'ed'to leve-120. The lower end of link N `is .pivoted inside ot 'core M, as shown in dotted. lines atg. Q, thenegative binding-post. l.The-

positive lbindingiprrstmay be placed anywhere, 1 amLbc connected' with the top-y plate of the case. `lt,lt,1a coilof insulatedfcopperwire, havin gan openin g ythrough the' center 'to alfv low the core liI to1no\efreely;-S, 'an`insulat4 ing-ring; T,'a"s1nal.l linky'c'onnecting' the levers O andl; U, the pivot, as 'fu lcrl 1nr o t` le ver 0'; V, the-fulcrunrof lever"P;` .W, a spring securedto the case at 1r, and pressing the lower v .toe-piece of the pawl Hontwardfa, a serew" rod, provided vWlhnut b,- iised'.to adjust the tension o fispringd... The loperatiinr of this lamp is as lollows:

The'carhons being` seeuredto lthe carriers and B, andthe wires of -a strong source of elec! trieit-yproperly connected, the top (posi tive) carbon mayube allowed to slide downward un; -til it touches and makes electrical contact with the lowerlnegative) carbon. Vhen the' circuit isthus establishedthe current passes' through the helix R R. This excites magneti ism int/he core M and draws -it downward wi th thelink N and levers Ol and P, also the mtcliet G,ia ck I, and negativecarbon carrier B. Thisdownward movementof the ilegaltive-carbon carrier'draw's the cordJ and raises the positiveearbon carrier A a corresponding until so much-of the carbon has been consumed 'that the ratchet Gis moved bevond the reach of pawl II. Then the ratchet urns upon its axis, and, .by allowing the 'negativer-carbon carrierto rise, will so 4slacken thecord J that the positive-carbon carrier can fall. As the carbons approach eachother the are is shortened-"fand the magnet-ism increased, 'This 1 the pin and as the pull of the rack I'is balanced 4move' Athe ratchet downward 'snciently to.

current ischanged. The link-T may also be to increase or dixninishits leverage, and to draws down the core M, and with it all its conncctions,nnti1. the ratchet is again held stationary by the pawl H. Should the carbons approach to'o near leach other, the increased magnetism draws the core still fartherinto the helix, as it ,will be seen that the pawl H is free to move downwar `with the ratchet.

-On the top side of the lever P, and near its fnlcrum V, is secured a small spring, c', the strength of vwhich is nearly equal to the tup;v ward pull of the rack I. When the stress is all upward, this spring is compressed; but 'when the ratchet has moved `upward away from the pawl until it is free to turn, then the spring i will throw the end of the lever P downr ward, and with it ratchet G, causing it to catch on the tooth next following the one liberated.

It will he seen that there is lost motion all' lowc'd at fnlcrum `V,the hole being larger than by spring i, it follows that any 'slight relaxation of this pull, which must o'ccur in the liberationdof the ratchet, must enable. the spring to.

catch the next succeedingy tooth on the pawl. The length of thearcmay be regulated by the nut l). The 'tension of thespring d has to he changed as the electro-motive force of the lchanged to give-the core more 'or less. travel,

adapt it 'to strong or weak currents of elec tricity.- By the axrangement ofthe levers as snoivnJ am engahled to make the work o light on the core that very little change in the elec tro-motive force is required to' vmore the carbons.A Y

- Having thus described my invention, what' I claim as new, and desire to secureby Letters Patent, is-' v 1. The combination of ratchet G, p'awl or detent H, rack I, and springt, when said ratchet 'G is attached to and operated by a train -of levers, as' hereinshown, 'and lfor the purpose set forth. e

2..The combination of ratchet G, pawl or detent H, and4 spring when constructed as 1 and operating 4in the manner and :for the purl pose herein shown and specilied.

3, Thecombination .of levers 0 and P,'linl is.

T and N, core M, and helix R R, when operating in connection with a rack, pinion, and ratchet, substantially as and for the purpose herein shown and specified.

4. The combination of springs 'and W, le-

ver P, and fulcrnm V, when constructed substantially as and operating inl the manner and forthe purpose herein shown and described.

5. 'The combination of cord J J J, pulleys E and D, eye K, and ratchet G, when oonstructed as and-operating in the manner and for the purpose herein shown and specifed o HIR'AM S. MAXIM. Witnesses:

W.'H. Toonen, GEQRGE R. WILLIAMSON.

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